Which type of attack was performed by Bruce using a radio transmitter to block Wi-Fi access temporarily?

The jamming attack is characterized by the intentional interference with wireless communication signals, rendering them unavailable or unusable. In this scenario, Bruce employs a radio transmitter to create noise or generate competing radio signals that disrupt the normal functioning of Wi-Fi access points, leading to a temporary loss of connectivity for users within the affected area.

This type of attack exploits the fact that radio frequency communication, like that used in Wi-Fi networks, is vulnerable to disruption by stronger signals. By broadcasting on the same frequencies used by Wi-Fi, the jamming effectively prevents legitimate users from accessing the network. This tactic doesn't involve directly intercepting or manipulating data but instead focuses on causing a denial of service by rendering the network unusable.

In contrast, the other options involve different methods of attack. Eavesdropping refers to unauthorized interception of data, an ad-hoc connection attack typically involves establishing a rogue network to deceive users, and client misassociation occurs when a device connects to a rogue access point instead of the legitimate one. These methods hinge on data interception or manipulation rather than the disruption of service by signal interference.